Microsoft has already offered information about the amount of usable onboard storage in its Surface tablets. That is apparently not good enough for one man, who has decided to file a lawsuit against Microsoft, claiming that the company has not been open enough about how much space is left over for his own files in the Windows RT-based device.

The Seattle Times reports that Los Angeles-based lawyer Andrew Sokolowski filed the lawsuit on Tuesday, claiming that his recent purchase of the 32 GB version of the Surface tablet ran into issues when he loaded up with music and documents. He claims that his tablet quickly ran out of storage space.

Sokolowski accuses Microsoft of false advertising and unfair business practices. He hopes to get back some of what Microsoft has earned from the Surface tablet as well as change the company's marketing efforts.

Microsoft has already responded to the lawsuit, claiming that it is without merit. Microsoft points out that the Surface tablet does have a SD card slot and a full USB port which can be used by people to expand the storage space of the Surface. It added, "Customers understand the operating system and pre-installed applications reside on the device's internal storage thereby reducing the total free space."

Earlier this month, Microsoft said that the 32 GB version of the Surface has about 16 GB available for its users, based on the install of Windows RT itself as well as pre-installed apps, including the Windows RT version of Office 2013 and Windows recovery tools. The 64 GB version has 46 GB of free storage space. Microsoft revealed this information on its website on November 5th and the lawsuit says that Sokolowski bought his Surface on November 7th.